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Characterization of Myxidium spinibarba sp. nov. (Cnidaria, Myxosporea, Myxidiidae) from Spinibarbus sinensis (Bleeker, 1871) in Chongqing China

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Abstract

In the present study, we described a new species of Myxidium Bütschli, 1882, obtained from the gallbladder of Spinibarbus sinensis (Bleeker, 1871) from the Jialing River in Chongqing, China. Myxidium spinibarba sp. nov. was identified based on morphological and SSU rDNA sequence data. The mature myxospores were fusiform in valvular view and ovoid in sutural view, with somewhat protrusive poles and mean dimensions (all in μm) of 11.8 ± 0.5 (10.6–12.4) in length and 6.1 ± 0.5 (5.5–7.2) in width. The polar capsules were pyriform and equal in size with mean dimensions of 3.6 ± 0.4 (3.0–4.4) in length and 3.0 ± 0.2 (2.7–3.2) in width. The new species was distinct from related species of Myxidium in its morphology and molecular characteristics. Phylogenetic analysis indicated the clustering of species based on the presence or absence of valvular striations. Moreover, myxospore morphology, rather than the host environment, played an important role in the partial phylogenetic clustering.

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Acknowledgments

We would like to appreciate Jing Zhang, MSc., for sampling Myxidium spinibarba sp. nov.

Funding

This work was supported by grants from the National Natural Science Foundation of China (nos. 31672280 and 31471980), project of Chongqing Science and Technology Commission (nos. cstc2017jcyjAX0165, cstc2018jcyjAX0738), Venture and Innovation Support Program for Chongqing Overseas Returnees (cx2018108).

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Authors and Affiliations

  1. Key Laboratory of Freshwater Fish Reproduction and Development (Ministry of Education), Southwest University School of Life Sciences, Chongqing, 400715, China

    Wei Chen

  2. Chongqing Key Laboratory of Animal Biology, College of Life Sciences, Chongqing Normal University, Chongqing, 401331, People’s Republic of China

    Wei Chen, Chengzhong Yang & Yuanjun Zhao

Authors
  1. Wei Chen
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  2. Chengzhong Yang
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  3. Yuanjun Zhao
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Correspondence to Yuanjun Zhao.

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Section Editor: Christopher Whipps

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Chen, W., Yang, C. & Zhao, Y. Characterization of Myxidium spinibarba sp. nov. (Cnidaria, Myxosporea, Myxidiidae) from Spinibarbus sinensis (Bleeker, 1871) in Chongqing China. Parasitol Res 119, 1485–1491 (2020). https://doi.org/10.1007/s00436-020-06644-0

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